<template>
  <div class="login-container">
    <!-- 导航栏 -->
    <van-nav-bar class="page-nav-bar" title="登录">
      <van-icon slot="left" name="cross" @click="$router.back()" />
    </van-nav-bar>

    <!-- 登录表单 -->
    <van-form @submit="onSubmit">
      <!-- 手机号 -->
      <van-field
        v-model="user.mobile"
        left-icon="icon-shouji"
        name="mobile"
        placeholder="请输入手机号"
        :rules="userFormRules.mobile"
        type="number"
        maxlength="11"
      >
        <i slot="left-icon" class="iconfont icon-shouji"></i>
      </van-field>

      <!-- 验证码 -->
      <van-field
        v-model="user.code"
        name="code"
        placeholder="请输入验证码"
        :rules="userFormRules.code"
        type="number"
        maxlength="6"
      >
        <i slot="left-icon" class="iconfont icon-yanzhengma"></i>

        <!-- 发送验证码 -->
        <template #button>
          <!-- 倒计时组件 -->
          <!-- time:倒计时时间 -->
          <van-count-down
            v-if="isCountDownShow"
            :time="1000 * 5"
            format="ss s"
            @finishi="isCountDownShow = false"
          />

          <van-button
            v-else
            round
            native-type="button"
            class="send-btn"
            size="small"
            type="default"
            @click="onSendSms"
            >发送验证码</van-button
          >
        </template>
      </van-field>

      <!-- 登录按钮 -->
      <div style="margin: 16px">
        <van-button
          block
          type="info"
          class="login-btn-wrap"
          native-type="submit"
          >登录</van-button
        >
      </div>
    </van-form>
  </div>
</template>

<script>
import { login, sendSms } from '@/api/user.js'
export default {
  name: 'LoginIndex',
  data () {
    return {
      user: {
        mobile: '', // 手机号
        code: '' // 验证码
      },
      userFormRules: {
        mobile: [
          {
            required: true,
            message: '手机号不能为空'
          },
          {
            pattern: /^1[3|5|7|8]\d{9}$/,
            message: '手机号格式错误'
          }
        ],
        code: [
          {
            required: true,
            message: '验证码不能为空'
          },
          {
            pattern: /^\d{6}$/,
            message: '验证码格式错误'
          }
        ]
      },
      isCountDownShow: false
    }
  },
  methods: {
    // 表单提交事件
    async onSubmit (values) {
      console.log('submit', values)

      this.$toast.loading({
        message: '登陆中...',
        forbidClick: true, // 禁用背景点击
        duration: 0
      })

      try {
        const { data } = await login(this.user)
        console.log('登陆成功', data)
        this.$store.commit('setUser', data.data)
        this.$toast.success('登陆成功')
        // 登录成功跳转回去
        this.$router.back()
      } catch (err) {
        if (err.response.status === 400) {
          this.$toast.fail('手机号或者验证码错误')
          console.log('手机号或者验证码错误')
        } else {
          this.$toast.fail('登陆失败,请稍后重试')
          console.log('登陆失败,请稍后重试', err)
        }
      }
    },

    async onSendSms () {
      console.log('onSendSms')
      // 校验手机号
      try {
        await this.$refs.loginForm.validate('mobile')
        console.log('验证成功')
      } catch (err) {
        return console.log('验证失败', err)
      }

      this.isCountDownShow = true

      //  请求发送验证码
      try {
        await sendSms(this.user.mobile)
        this.$toast('发送成功')
      } catch (err) {
        console.log('发送失败', err)
        // 发送失败，关闭倒计时
        this.isCountDownShow = false
        if (err.response.status === 429) {
          this.$toast('发送太频繁了,请稍后重试')
        } else {
          this.$toast('发送失败,请稍后重试')
        }
      }
    }
  }
}
</script>

<style scoped lang="less">
.login-container {
  .iconfont {
    font-size: 27px;
  }

  .send-btn {
    background-color: #ededed;
    width: 82px;
    height: 26px;
    line-height: 46px;
    color: #666;
  }
  .login-btn-wrap {
    background-color: #6bd4fb;
  }
}
</style>
